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If the A/C compressor does not work, inadequate refrigerant quantity or the A/C
compressor circuit is suspected..
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- Malfunction of A/C compressor
- Malfunction of A/C compressor relay
- Damaged harness wires and connectors
- Malfunction of engine-ECU
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Q.
Is the check result normal?
Go to Step 2.
Repair the connector.
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(1)Disconnect the connector, and measure at the wiring harness side. (2)Turn the ignition switch to the "ON" position.
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(3)Disconnect engine-ECU connector C-105 and earth terminal 40.
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(4)Voltage between terminal 1 and body earth. OK: System voltage
Q.
Is the check result normal?
Go to Step 11.
Go to Step 3.
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Q.
Is the check result normal?
Go to Step 4.
Repair the connector.
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Q.
Is the A/C compressor relay in good condition?
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Replace the A/C compressor relay.
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(1)Remove the relay, and measure at the relay box side. (2)Turn the ignition switch to the "ON" position.
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(3)Voltage between terminal 1 and body earth. OK: System voltage
Q.
Is the check result normal?
Go to Step 7.
Go to Step 6.
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- Check the A/C compressor relay power supply line for open circuit.
Q.
Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00, How to Cope
with Intermittent Malfunction ).
Repair the wiring harness.
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(1)Remove the relay, and measure at the relay box side. (2)Turn the ignition switch to the "ON" position.
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(3)Voltage between terminal 4 and body earth. OK: System voltage
Q.
Is the check result normal?
Go to Step 9.
Go to Step 8.
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- Check the A/C compressor relay power supply line for open circuit.
Q.
Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00, How to Cope
with Intermittent Malfunction ).
Repair the wiring harness.
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note |
Prior to the wiring harness inspection, check intermediate connector A-28 and A-27, and
repair if necessary.
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- Check the A/C compressor relay power supply line for open circuit.
Q.
Is the check result normal?
Go to Step 10.
Repair the wiring harness.
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- Check the A/C compressor power supply line for open circuit.
Q.
Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00, How to Cope
with Intermittent Malfunction ).
Repair the wiring harness.
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Q.
Can the sound of the magnetic clutch (click) be heard?
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Replace the compressor magnet clutch.
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Q.
Is the refrigerant level correct?
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Correct the refrigerant level (Refer to ).
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Check that the compressor works normally.
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Q.
Is the check result normal?
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This diagnosis is complete.
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